In this work, the aplication of termics shocks was evaluated during the rneiosis I
(period post-fecundation) over the grow the and larval survivel of Argopecten purpuratus
and also triploide obtention was verificated of. The results that were obtained indicate that
exist a significative difference arnong the cold and warm shock treatrnent respect to the
control, in groutw rate and larval survivel. Respect to the triploides obtention in differents
stage (ernbryonic, larva Véliger, larva Pedivéliger) low percentages of triploidization were
observed, this results shows that the gairn in grown the and larval survivel, would not be
asociated directy with the triploide condition of this larve. But if could be relationed to a
high relative disponibility of rneals, product of larger rnortality watched, in larves to
subrnitted to therrnic shock.